work on define overrides

Makesure.md

@@ -34,8 +34,8 @@
 25. [ ] (?) `-F` to force build despite the reached_if
 26. [x] `-x` to enable tracing in bash
 27. [x] support `@options silent` mode and flag `-s`
-28. [ ] allow override @define-s
-    - [ ] `-D "var=val"` / `--define "var=val"`
+28. [x] allow override @define-s
+    - [x] `-D "var=val"` / `--define "var=val"`
 29. [x] support @options directive
     - [x] @options tracing
     - [x] @options silent

tests/10_define.sh

@@ -0,0 +1,17 @@
+
+
+@define A=aaa
+@define B=${A}bbb
+C=ccc
+
+@goal testA
+echo A=$A
+
+@goal testB
+echo B=$B
+
+@goal testC
+echo C=$C
+
+@goal testABC
+@depends_on testA testB testC

tests/10_define.tush

@@ -0,0 +1,35 @@
+
+$ cd "$MYDIR"; ./makesure -f tests/10_define.sh testA
+|   goal 'testA' ...
+| A=aaa
+
+$ cd "$MYDIR"; ./makesure -f tests/10_define.sh testB
+|   goal 'testB' ...
+| B=aaabbb
+
+$ cd "$MYDIR"; ./makesure -f tests/10_define.sh -D B=xxx testB
+|   goal 'testB' ...
+| B=xxx
+
+$ cd "$MYDIR"; ./makesure -f tests/10_define.sh testC
+|   goal 'testC' ...
+| C=
+
+$ cd "$MYDIR"; ./makesure -f tests/10_define.sh testABC
+|   goal 'testA' ...
+| A=aaa
+|   goal 'testB' ...
+| B=aaabbb
+|   goal 'testC' ...
+| C=
+|   goal 'testABC' [empty].
+
+$ cd "$MYDIR"; ./makesure -f tests/10_define.sh testABC --define A=111 -D "B=222" --define 'C=333'
+|   goal 'testA' ...
+| A=111
+|   goal 'testB' ...
+| B=222
+|   goal 'testC' ...
+| C=333
+|   goal 'testABC' [empty].
+